Ball point pen



FIG. 1 is a front elevational view of a ball point pen showing my new design, the rear elevational view being identical;

FIG. 2 is a side elevational view thereof, the opposite side being identical to that shown;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a ball point pen, as shown and described. 